Primates who engage in greater male-on-male competition devote more brain matter to aggression, whereas gentler species, in which males and females tend to mix socially, have bigger brains and higher-level thinking. | Harper's Magazine

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Primates who engage in greater male-on-male competition devote more brain matter to aggression, whereas gentler species, in which males and females tend to mix socially, have bigger brains and higher-level thinking.

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Primates who engage in greater male-on-male competition devote more brain matter to aggression, whereas gentler species, in which males and females tend to mix socially, have bigger brains and higher-level thinking.

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